package com.woniu.ucenterservice.web;


import com.google.gson.Gson;
import com.woniu.ucenterservice.dao.UserMapper;
import com.woniu.ucenterservice.pojo.User;
import com.woniu.ucenterservice.utils.ConstantPropertiesUtil;
import com.woniu.ucenterservice.utils.HttpClientUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpSession;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.HashMap;

@CrossOrigin
@Controller//注意这里没有配置 @RestController
@RequestMapping("/api/ucenter/wx")
public class WxApiController {
    @Autowired
    UserMapper userMapper;


    @GetMapping("callback")
    public String callback(String code, String state, HttpSession session) throws Exception {
        int id = 0;
        String token = null;
        //得到授权临时票据code
        System.out.println("code = " + code);
        System.out.println("state = " + state);
        //向认证服务器发送请求换取access_token
        String baseAccessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token" +
                "?appid=%s" +
                "&secret=%s" +
                "&code=%s" +
                "&grant_type=authorization_code";

        String accessTokenUrl = String.format(baseAccessTokenUrl,
                ConstantPropertiesUtil.WX_OPEN_APP_ID,
                ConstantPropertiesUtil.WX_OPEN_APP_SECRET,
                code);

        String result = HttpClientUtils.get(accessTokenUrl);
        System.out.println("accessToken=============" + result);

        //解析json字符串
        Gson gson = new Gson();
        HashMap map = gson.fromJson(result, HashMap.class);
        String accessToken = (String) map.get("access_token");
         String openid = (String) map.get("openid");

        //查询数据库当前用用户是否曾经使用过微信登录
        User user = userMapper.select(openid.hashCode());
        System.out.println(user+"121313");

        if (user == null) {
            System.out.println("新用户注册");

            //访问微信的资源服务器，获取用户信息
            String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +
                    "?access_token=%s" +
                    "&openid=%s";
            String userInfoUrl = String.format(baseUserInfoUrl, accessToken, openid);
            String resultUserInfo = null;
            resultUserInfo = HttpClientUtils.get(userInfoUrl);
            System.out.println("resultUserInfo==========" + resultUserInfo);

            //解析json
            HashMap mapUserInfo = gson.fromJson(resultUserInfo, HashMap.class);
            String nickname = (String) mapUserInfo.get("nickname");
            //String headimgurl = (String) mapUserInfo.get("headimgurl");

            //向数据库中插入一条记录
            User newUser = new User();
            //为了唯一int类型,取openid的hashCode
          id = openid.hashCode();
            newUser.setOpenId(id);
            newUser.setUsername(nickname);
           // newUser.setAvatar(headimgurl);
           userMapper.insert(newUser);
            session.setAttribute("user",newUser);
            //TODO 登录
//            token = JwtUtils.getJwtToken(id, newUser.getName());
//
//            System.out.println("user=null=========>getJwtToken方法返回的token值" + token);
        } else {
//            token = JwtUtils.getJwtToken(id, user.getName());
//            System.out.println("user!=null=========>getJwtToken方法返回的token值" + token);
            session.setAttribute("user",user);
            return "redirect:http://localhost:8150/center/index";
        }
        //登录的token

        //存入cookie
        //CookieUtils.setCookie(request, response, "guli_jwt_token", token);

        //因为端口号不同存在跨域问题，cookie不能跨域，所以这里使用url重写
        return "redirect:http://localhost:8150/center/index";
    }

    @GetMapping("login")
    public String genQrConnect(HttpSession session) {

        // 微信开放平台授权baseUrl
        String baseUrl = "https://open.weixin.qq.com/connect/qrconnect" +
                "?appid=%s" +
                "&redirect_uri=%s" +
                "&response_type=code" +
                "&scope=snsapi_login" +
                "&state=%s" +
                "#wechat_redirect";

        // 回调地址
        String redirectUrl = ConstantPropertiesUtil.WX_OPEN_REDIRECT_URL; //获取业务服务器重定向地址
        try {
            redirectUrl = URLEncoder.encode(redirectUrl, "UTF-8"); //url编码
        } catch (UnsupportedEncodingException e) {
//            throw new MyException(20001, e.getMessage());

        }

        // 防止csrf攻击（跨站请求伪造攻击）
        //String state = UUID.randomUUID().toString().replaceAll("-", "");//一般情况下会使用一个随机数
        String state = "imhelen";//为了让大家能够使用我搭建的外网的微信回调跳转服务器，这里填写你在ngrok的前置域名
        System.out.println("state = " + state);

        // 采用redis等进行缓存state 使用sessionId为key 30分钟后过期，可配置
        //值：satte
        //过期时间：30分钟

        //生成qrcodeUrl
        String qrcodeUrl = String.format(
                baseUrl,
                ConstantPropertiesUtil.WX_OPEN_APP_ID,
                redirectUrl,
                state);

        return "redirect:" + qrcodeUrl;
    }
}